Patents by Inventor Rita Majewski
Rita Majewski has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230167287Abstract: Impact copolymer (ICP) compositions may include those having a melt strength (MS) and melt flow rate (MFR) described according to the formula: MS?325×MFR?1.7, wherein the MS is greater than 1 cN. Methods of producing an impact copolymer (ICP) composition may include coupling the ICP composition with a coupling agent, wherein the ICP composition includes a matrix polymer and a dispersed component; wherein the ICP composition possesses a measurable melt strength (MS) and melt flow rate (MFR) satisfying the equation: MS?325×MFR?1.7, wherein the MS is greater than 1 cN.Type: ApplicationFiled: January 12, 2023Publication date: June 1, 2023Applicant: Braskem America, Inc.Inventors: Joel Carr, Gerd Lohse, Rajendra Krishnaswamy, William Scott Miller, Rita Majewski
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Patent number: 10808111Abstract: The present invention provides an in-reactor solution that avoids costly blending and the use of metallocene elastomers. The inventive Ziegler-Natta polypropylene composition also includes additional components that may improve properties relative to a metallocene catalyzed elastomers. The invention is a clear impact polypropylene composition that is made in-reactor with Ziegler-Natta catalyst, and is suitable for a wide range of processes. Unlike other clear impact copolymers, it does not rely on high-shear processes or compounding with elastomers. The invention uses conventional polypropylene reactor technology to produce these compositions.Type: GrantFiled: March 13, 2014Date of Patent: October 20, 2020Assignee: Braskem America, Inc.Inventors: Peter Simon Dias, Craig Charles Meverden, Edward E. Catalina, Thomas Cuthbert, Rita Majewski, Debra R. Wilson
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Publication number: 20190194436Abstract: Impact copolymer (ICP) compositions may include those having a melt strength (MS) and melt flow rate (MFR) described according to the formula: MS?325×MFR?1.7, wherein the MS is greater than 1 cN. Methods of producing an impact copolymer (ICP) composition may include coupling the ICP composition with a coupling agent, wherein the ICP composition includes a matrix polymer and a dispersed component; wherein the ICP composition possesses a measurable melt strength (MS) and melt flow rate (MFR) satisfying the equation: MS?325×MFR?1.7, wherein the MS is greater than 1 cN.Type: ApplicationFiled: December 21, 2018Publication date: June 27, 2019Applicant: Braskem America, Inc.Inventors: Joel Carr, Gerd Lohse, Rajendra Krishnaswamy, William Scott Miller, Rita Majewski
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Publication number: 20160194488Abstract: The present invention relates to a class of impact copolymer polypropylene (ICP) compositions exhibiting the advantageous combination of excellent tiger (flow) marking performance in large/long molded parts, very low gels count and exceptional mold flowability (high MFR) despite the high viscosity ratio (e.g., >4) between rubber and propylene based matrix phases. Furthermore, it has been surprisingly found that the inventive compositions are associated with a low gels count even when using a quite coarse mesh wire screen, e.g., 60 mesh wire screen, independent of screw type e.g., twin or single screw. Finally, the inventive compositions exhibit significantly reduced the levels of volatiles, and excellent stiffness-impact balance used as standalone materials or in filled compounds. The significantly reduced number of large gels leads to excellent surface appearance and paintability of the molded parts. The composition of the present invention is made with a bulk/gas reactor process (i.e.Type: ApplicationFiled: February 22, 2016Publication date: July 7, 2016Inventors: Antonios K. Doufas, Edward Catalina, William C. Thurston, Rita Majewski
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Publication number: 20160040000Abstract: The present invention provides an in-reactor solution that avoids costly blending and the use of metallocene elastomers. The inventive Ziegler-Natta polypropylene composition also includes additional components that may improve properties relative to a metallocene catalyzed elastomers. The invention is a clear impact polypropylene composition that is made in-reactor with Ziegler-Natta catalyst, and is suitable for a wide range of processes. Unlike other clear impact copolymers, it does not rely on high-shear processes or compounding with elastomers. The invention uses conventional polypropylene reactor technology to produce these compositions.Type: ApplicationFiled: March 13, 2014Publication date: February 11, 2016Inventors: Peter Simon Dias, Craig Charles Meverden, Edward E. Catalina, Thomas Cuthbert, Rita Majewski, Debra R. Wilson
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Publication number: 20140107274Abstract: The present disclosure relates to a class of impact copolymer polypropylene (ICP) compositions exhibiting the advantageous combination of excellent tiger (flow) marking performance in large/long molded parts, very low gels count and exceptional mold flowability (high MFR) despite the high viscosity ratio (e.g., >4) between rubber and propylene based matrix phases. Furthermore, it has been surprisingly found that the inventive compositions are associated with a low gels count even when using a quite coarse mesh wire screen, e.g., 60 mesh wire screen, independent of screw type e.g., twin or single screw. Finally, the inventive compositions exhibit significantly reduced the levels of volatiles, and excellent stiffness-impact balance used as standalone materials or in filled compounds. The significantly reduced number of large gels leads to excellent surface appearance and paintability of the molded parts. The composition of the present disclosure is made with a bulk/gas reactor process (i.e.Type: ApplicationFiled: December 23, 2013Publication date: April 17, 2014Applicant: Braskem America, Inc.Inventors: Jeffrey S. Salek, Rita A. Majewski
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Publication number: 20120157599Abstract: The present invention relates to a class of impact copolymer polypropylene (ICP) compositions exhibiting the advantageous combination of excellent tiger (flow) marking performance in large/long molded parts, very low gels count and exceptional mold flowability (high MFR) despite the high viscosity ratio (e.g., >4) between rubber and propylene based matrix phases. The inventive compositions exhibit significantly reduced the levels of volatiles, and excellent stiffness-impact balance used as standalone materials or in filled compounds. The significantly reduced number of large gels leads to excellent surface appearance and paintability of the molded parts. The composition of the present invention is made with a bulk/gas reactor process (i.e., non-slurry/non-solvent process) that has the advantage of process simplicity, process efficiency and simplicity of compositional structure relative to the complexity in structure and process of making of compositions in the prior art.Type: ApplicationFiled: December 16, 2011Publication date: June 21, 2012Inventors: Antonios K. Doufas, Edward Catalina, William C. Thurston, Rita Majewski
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Patent number: 7750081Abstract: A polypropylene resin, useful for the production of biaxially oriented polypropylene (BOPP) film, is provided. The polymer of the present invention is a blend of high crystalline polypropylene homopolymer and a high ethylene ethylene/propylene random copolymer (RCP). The present invention also provides a method of preparing the novel resin as well as a novel BOPP film comprising the resin.Type: GrantFiled: October 1, 2008Date of Patent: July 6, 2010Assignee: Sunoco Chemicals, Inc.Inventors: Aaron Seung-Joon Rhee, Kimberly Miller McLoughlin, Rita Majewski, Rubén A. Migone, Sehyun Kim
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Publication number: 20100081755Abstract: A polypropylene resin, useful for the production of biaxially oriented polypropylene (BOPP) film, is provided. The polymer of the present invention is a blend of high crystalline polypropylene homopolymer and a high ethylene ethylene/propylene random copolymer (RCP). The present invention also provides a method of preparing the novel resin as well as a novel BOPP film comprising the resin.Type: ApplicationFiled: October 1, 2008Publication date: April 1, 2010Applicant: Sunoco, Inc. (R&M)Inventors: Aaron Seung-Joon Rhee, Kimberly Miller McLoughlin, Rita Majewski, Ruben A. Migone, Sehyun Kim
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Publication number: 20100081760Abstract: A polypropylene resin, useful for the production of biaxially oriented polypropylene (BOPP) film, is provided. The polymer of the present invention is a blend of high crystalline polypropylene homopolymer and a high ethylene ethylene/propylene random copolymer (RCP). The present invention also provides a method of preparing the novel resin as well as a novel BOPP film comprising the resin.Type: ApplicationFiled: October 1, 2008Publication date: April 1, 2010Applicant: Sunoco, Inc. (R&M)Inventors: Aaron Seung-Joon Rhee, Kimberly Miller McLoughlin, Rita Majewski, Ruben A. Migone, Sehyun Kim
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Publication number: 20100081756Abstract: A polypropylene resin, useful for the production of biaxially oriented polypropylene (BOPP) film, is provided. The polymer of the present invention is a blend of high crystalline polypropylene homopolymer and a high ethylene ethylene/propylene random copolymer (RCP). The present invention also provides a method of preparing the novel resin as well as a novel BOPP film comprising the resin.Type: ApplicationFiled: October 1, 2008Publication date: April 1, 2010Applicant: Sunoco, Inc. (R&M)Inventors: Aaron Seung-Joon Rhee, Kimberly Miller McLoughlin, Rita Majewski, Ruben A. Migone, Sehyun Kim